*{
    margin: 0;
    padding: 0;
    list-style: none;
}
.box{
    position: absolute;
    width: 100%;
    height: 600px;
    top:0;
    bottom: 0;
    left:0;
    right: 0;
    margin: auto;
}
.box img{
    width: 100%;
    height: 600px;
}
.btn-left{
    position: absolute;
    top:calc(50% - 50px);
    text-align: center;
    line-height: 40px;
    width: 50px;
    height: 140px;
    background: #95999c;
    opacity: 0.6;
    cursor:pointer
}
.btn-right{
    position: absolute;
    top:calc(50% - 50px);
    right: 0;
    text-align: center;
    line-height: 40px;
    width: 50px;
    height: 140px;
    background: #95999c;
    opacity: 0.6;
    cursor:pointer
}
.arrow{
    display: block;
    font-size:30px;
    margin: auto;
    font-family: "宋体", serif;
}
.points{
    position: absolute;
    width: 140px;
    height: 20px;
    bottom: 20px;
    top:88%;
    left: calc(50% - 70px);
}
.points li{
    border-radius: 25px;
    width: 15px;
    height:15px;
    background: #95999c;
    opacity: 0.7;
    float: left;
    margin:2.5px 10px;
    z-index: 200;
}
.points li:nth-of-type(1){
    background: #DC143C;
    opacity: 1;
}
